A fantastic voyage into the cold inner workings of a mystical modern machine.
The superconducting qubits sit on the chip and have been packaged into something like a printed circuit board. Wires and coaxial cables for input and output signals protrude off the circuit board. In newer models of higher-qubit chips, IBM has been working towards more compact solutions involving wiring and integrated components to be more efficient with space. Having less clutter means that the components would be easier to cool.
Unlike typical harmonic oscillators, a nonlinear oscillator gives you an unequal spacing of energy levels, Chow says. “When you have that, you can isolate the lowest two to act as your quantum zero and your quantum one.”Think of a hydrogen atom. From a physics standpoint, it has a set of energy levels. The right wavelengths of light hitting this atom could promote it to different states. When microwaves hit the qubit, it is doing something similar.
The interest IBM has been seeing in terms of quantum problems posed to their machines can be grouped into three buckets: chemistry and materials, machine learning, and optimization . The key is not to use a quantum computer in every part of the problem—but on the parts that are hardest.
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